170 Maria
S-type Main-belt asteroid
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170 Maria is a Main belt asteroid that was discovered by French astronomer Henri Joseph Perrotin on January 10, 1877.[3] Its orbit was computed by Antonio Abetti, and the asteroid was named after his sister, Maria. This is the namesake of the Maria asteroid family; one of the first asteroid families to be identified by Japanese astronomer Kiyotsugu Hirayama in 1918.[4] This family may be the parent body of the large near-Earth objects 433 Eros and 1036 Ganymed.[5]
Asteroid Maria passing near a cluster of galaxies as seen by a four inch telescope over a period of nearly two hours. | |
| Discovery | |
|---|---|
| Discovered by | J. Perrotin |
| Discovery date | 10 January 1877 |
| Designations | |
| (170) Maria | |
| Pronunciation | /mÉËriËÉ/ mÉ-REE-É |
| A877 AA; 1958 AC | |
| Main belt (Maria) | |
| Orbital characteristics[1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 116.69 yr (42622 d) |
| Aphelion | 2.7161 AU (406.32 Gm) |
| Perihelion | 2.3923 AU (357.88 Gm) |
| 2.5542 AU (382.10 Gm) | |
| Eccentricity | 0.063388 |
| 4.08 yr (1491.0 d) | |
| 88.062° | |
| 0° 14m 29.184s / day | |
| Inclination | 14.377° |
| 301.34° | |
| 159.21° | |
| Earth MOID | 1.4114 AU (211.14 Gm) |
| Jupiter MOID | 2.39948 AU (358.957 Gm) |
| TJupiter | 3.392 |
| Physical characteristics | |
| Dimensions | 44.30±1.0 km |
| 13.120 h (0.5467 d) | |
| 0.1579±0.007 | |
| S[2] | |
| 9.39 | |
This object is orbiting the Sun at a distance of 2.55 AU with a low eccentricity of 0.063 and an orbital period of 4.08 years. The orbital plane is inclined at an angle of 14.4° to the plane of the ecliptic. The diameter of this body has been measured as 44.3 km.
In the Tholen classification system, this is categorized as a stony S-type asteroid based on its spectrum.[2] Observations performed at the Palmer Divide Observatory in Colorado Springs, Colorado during 2007 produced a light curve with a period of 13.120±0.002 hours and a brightness range of 0.21±0.02 in magnitude. Previous measurements from 2000 gave 13.14 and 5.510 hour estimates for the period.[6]
An occultation of a star by Maria was observed from Manitoba, Canada, on June 10, 1997.
